\begin{tabular}{l *{4}{c}}
\toprule
                    &         (1)   &         (2)   &         (3)   &         (4)   \\
 & \multicolumn{4}{c}{=1 if passed SI comprehension\tnote{a}} \\
\cmidrule(lr){2-5}
 & \multicolumn{2}{c}{Malawi} & \multicolumn{2}{c}{Liberia} \\
\cmidrule(lr){2-3}\cmidrule(lr){4-5}
\midrule
=1 if said: \\
audio loud enough to hear&      -0.091   &               &       0.036   &               \\
                    &     (0.081)   &               &     (0.109)   &               \\
audio speaking speed okay&               &       0.026   &               &       0.036   \\
                    &               &     (0.180)   &               &     (0.109)   \\
\\
R-squared           &       0.001   &       0.000   &       0.000   &       0.000   \\
Outcome mean when said no&        0.92   &        0.80   &        0.83   &        0.83   \\
Observations        &         866   &         867   &         616   &         615   \\
\bottomrule
\end{tabular}
